Generation of internal gravity vortices in the high-latitude ionosphere

Chmyrev, V. M.; Сорокин, В. М.

doi:10.1016/j.jastp.2010.05.013

Cited by 13 publications

(5 citation statements)

References 35 publications

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“…An increase of electric field in the ionosphere before impending EQ is accompanied by instability of acoustic-gravitational waves (AGW) [63,64]. The critical electric field for the instability occurrence is 6-10 mV/m.…”

Section: Discussionmentioning

confidence: 99%

Possible Interrelations of Space Weather and Seismic Activity: An Implication for Short-term Earthquake Prediction

Sorokin,

Novikov

2024

Preprint

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The statistical analysis of impact of the top 50 solar flares of X-class (1997-2023) on the global seismic activity, as well as on the earthquake preparation zones located in illuminated part of the globe and in the area of 5000 km radius around the subsolar point was carried out. It is shown by a method of epoch superposition that for all cases the increase of seismicity is observed, especially in the region around the subsolar point (up to 38%) during 10 days after the solar flare in comparison with preceding 10 days. The case study of aftershock sequence of strong M=9.1 earthquake (Su-matra-Andaman Islands, 26.12.2004) after the solar flare of X7.2 class (20.01.2005) demonstrated that the number of aftershocks with magnitude M≥2.5 increases more than 20 times after the solar flare with a delay of 7 days. For the case of the Darfield earthquake (M=7.1, 04.09.2010, New Zealand) it was shown that strong solar flares of class X and M probably triggered two strong aftershocks (M>6) with the same delay of 6 days on the Port Hills fault, which is the most sensitive to external electromagnetic impact from point of view of the fault electrical conductivity and orientation. Based on the obtained results the possible application of natural electromagnetic triggering of earthquakes is discussed for a short-term earthquake prediction using confidently recorded strong external electromagnetic triggering impacts on the specific earthquake preparation zones, as well as ionospheric perturbations due to aerosol emission from the earthquake sources recorded by satellites.

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Section: Discussionmentioning

confidence: 99%

Possible Interrelations of Space Weather and Seismic Activity: An Implication for Short-term Earthquake Prediction

Sorokin,

Novikov

2024

Preprint

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“…This good correlation cannot be explained by the mechanism of LAI coupling. The study in this paper concerns electric field under normal conditions but in case of seismic activity, it could explain why the electric field induced in the lithosphere-atmosphere could propagate up to the ionosphere and trigger ionospheric perturbations [7,[38][39][40][41][42].…”

Section: Discussionmentioning

confidence: 99%

Comparison of ULF electric field recorded by ground-based stations in China and a low-altitude satellite

Yao

Wang

Parrot

et al. 2021

Eur. Phys. J. Spec. Top.

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The correlation and synchronization between ground-based and space-based electric field in calm period, is the basis for a comprehensive study of earthquake monitoring. However, it is difficult to study their relevance because of large dissimilarities on data records. The DC-ULF electric field recorded by the DEMETER satellite and the geo-electric field observed in ground-based stations in China were comprehensively analyzed in this paper. The results show that the ionospheric electric field after removing the additional electric field caused by the satellite motion in the magnetic field has a stable annual variation trend; both the annual variation trend and the amplitude of ionospheric electric field above different locations in China are similar. The synchronous, corresponding and similar significant annual variation trends of both ionospheric electric field and geo-electric field in the same direction and with same frequency were found above some locations. The trend displays higher value in summer and lower value in winter. The Sq (Solar quiet) current system is the main source for these phenomena. It is noticed that the shapes and amplitude of geoelectric field for different stations are different, largely due to their individual underground layer conductivity, water level and so on. It is of great significance to explore the correlation and consistency between ground-based and space-based data in order to recognize the anomalies related to the seismic activity and to understand the LAI (Lithosphere-Atmosphere-Ionosphere) coupling mechanism.

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“…which applies for longer times, i.e., t ∼ o(1/η 0 ). Substituting the perturbation expansion (35) into Eq. ( 34), we obtain the following first and second order equations.…”

Section: Evolution Of Ig Solitary Vortex: Analytical Approachmentioning

confidence: 99%

“…Also, the nonlinear generation of low-frequency and large-scale zonal flow and relatively small-scale electromagnetic coupled IG and Alfvén waves in the Earth's stratified weakly ionized ionospheric E-layer was investigated by Kaladze et al [34]. The influence of the DC electric field on the heating and instability of IG waves leading to the formation of solitary vortex structures was studied by Chmyrev and Sorokin [35]. The nonlinear AGWs, generated by seismic activity, propagating in the stable stratified ionospheric E-layer were shown [36] to cause intensification of atomic oxygen green line emission when their amplitudes become sufficiently large.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear evolution of internal gravity waves in the Earth's ionosphere: Analytical and numerical approach

Kaladze,

Misra,

Roy

et al. 2021

Preprint

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The nonlinear propagation of internal gravity waves in the weakly ionized, incompressible Earth's ionosphere is studied using the fluid theory approach. Previous theory in the literature is advanced by the effects of the terrestrial inhomogeneous magnetic field embedded in weakly ionized ionospheric layers ranging in altitude from about 50 to 500 km. It is shown that the ionospheric conducting fluids can support the formation of solitary dipolar vortices (or modons). Both analytical and numerical solutions of the latter are obtained and analyzed. It is found that in absence of the Pedersen conductivity, different vortex structures with different space localization can be formed which can move with the supersonic velocity without any energy loss. However, its presence can cause the amplitude of the solitary vortices to decay with time and the vortex structure can completely disappear owing to the energy loss. Such energy loss can be delayed, i.e., the vortex structure can prevail for relatively a longer time if the nonlinear effects associated with either the stream function or the density variation become significantly higher than the dissipation due to the Pedersen conductivity. The main characteristic dynamic parameters are also defined which are in good correlation with the existing experimental data.

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Generation of internal gravity vortices in the high-latitude ionosphere

Cited by 13 publications

References 35 publications

Possible Interrelations of Space Weather and Seismic Activity: An Implication for Short-term Earthquake Prediction

Possible Interrelations of Space Weather and Seismic Activity: An Implication for Short-term Earthquake Prediction

Comparison of ULF electric field recorded by ground-based stations in China and a low-altitude satellite

Nonlinear evolution of internal gravity waves in the Earth's ionosphere: Analytical and numerical approach

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